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anonymous

  • 5 years ago

Write a system of two equations using x and y in each for the following. The sum of two numbers is 170 and their difference is 26. Find the two numbers.

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  1. anonymous
    • 5 years ago
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    no u

  2. anonymous
    • 5 years ago
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    lol

  3. anonymous
    • 5 years ago
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    pleeeeeaseeeeeeeeeee? I am having to retake all this :p And i dont remember a thing!! Its from the begining of the year :P

  4. anonymous
    • 5 years ago
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    x+y=170 x-y=26 __________ So x=26+y 26+y+y=170 solve for y, plug and chug the first eqn to get x

  5. anonymous
    • 5 years ago
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    wat???

  6. anonymous
    • 5 years ago
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    woops messed up.

  7. anonymous
    • 5 years ago
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    O.o

  8. anonymous
    • 5 years ago
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    i don't get it

  9. anonymous
    • 5 years ago
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    nvm no I didn't

  10. anonymous
    • 5 years ago
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    You know that x and y together are 170 You know the difference is 26 So you know x or y being added to 26 is y or x respectively (doesnt matter) So you sub that into your first eqn. Then solve.

  11. anonymous
    • 5 years ago
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    \[x+y=170\] \[x-y=26\] add to get \[2x=196\] \[x=148\]

  12. anonymous
    • 5 years ago
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    x+y=170 and y-x=26 y-x=26 y=26+x x+26+x=170 2x=170-26 2x=144 x=72 x+y=170 72+y=170 y=170-72 y=98

  13. anonymous
    • 5 years ago
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    that is the correct answer:)

  14. anonymous
    • 5 years ago
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    and since \[x=148\] \[148+y=170\] \[y=170-148=22\]

  15. anonymous
    • 5 years ago
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    oops sorry

  16. anonymous
    • 5 years ago
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    \[\frac{196}{2}=98\]you are correct and i am wrong.

  17. anonymous
    • 5 years ago
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    thank you satellite73. it is okay.

  18. anonymous
    • 5 years ago
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    sometimes i have a hard time dividing by 2!

  19. anonymous
    • 5 years ago
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    lol, that is why, being careful will help us arrive to the answer correctly.

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